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Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Exophthalmos. The protrusion of the eyes is a common symptom of hyperthyroidism. Exophthalmos. The protrusion of the eyes is a common symptom of hyperthyroidism.
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Video: Digestive chemicals - types & enzymes

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